Staff has already said that money walls will not be added back, as it was not as popular as the game it was based off of (Eggwars) and due to the high number of bugs that existed in the game.
Here is a quote from Tacosbefriends about it
Hi guys. I appreciate the enthusiasm you all have for Money Walls, but at the end of the day, it was just an uncreative, uninspired clone of Eggwars. I can't help but feel that if there were a "Meh, I guess" option for the vote, it would be the majority rather than yes (everyone always votes yes for new features.) It's highly unlikely that Money Walls will be making a return, for several reasons:
- Game-killing bug. The final nail in Money Wall's coffin was the inexplicable bug that caused the game to boot everyone upon starting. Simply put, our devs have bigger fish to fry than to fix a less popular version of a major game.
- Lack of originality. It's literally Eggwars but with slightly different loot, the egg is replaced with a skeleton, and the island aspect is removed. Removing Money Walls makes room for new games, like Blockband. It should be noted that Blockband didn't "replace" Money Walls. It is in no way meant as a substitute for the removed game. We just happened to put it in Money Walls' place.
- Unpopular. The game always played second fiddle to Eggwars, which is one of our most trafficked games.
- New potential. With one game gone, we have room for a new game. Maybe we'll port a classic over from the Chunk; maybe we'll make one of the countless games I've suggested over the years. The possibilities are endless!
In conclusion, it's probably not coming back. I don't have the final say, obviously, but from past experience, it's a safe bet that Money Walls is gone for good.